|
|
D.9.3.2 surfer
Procedure from library surf.lib (see surf_lib).
- Usage:
- surfer(f); f poly
- Assume:
- f defines a surface given by one equation
- Return:
- nothing
- Note:
- requires the external program `surfer` to be installed,
to close the graphical interface just close the window of surfer
Example:
| | LIB "surf.lib";
ring rr1 = 0,(x,y,z),dp;
// Steiner surface
ideal J(2) = x^2*y^2+x^2*z^2+y^2*z^2-17*x*y*z;
surfer(J(2));
// --------------------
surfer(x*(x2-y2)+z2);
// E7
surfer(x^3-x*y^3+z^2);
// Whitney umbrella
surfer(z^2-x^2*y);
|
|
